The sensitivity of identified modal parameters to sensor placement errors and construction tolerances
Abstract
This paper examines the sensitivity of experimentally measured modal frequencies and mode shapes to structural reassembly and sensor placement errors on a suspended three-bay truss. The statistical variations of identified mode shapes and frequencies are measured by repeated experiments. Both parameters are shown to vary measurably more with reassembly than sensor placement errors. Also, a directional stiffness in the truss joints was found to cause a parameter dependence on member orientation during reconstruction.
- Publication:
-
AIAA/ASME/ASCE/AHS/ASC 34th Structures, Structural Dynamics, and Materials Conference
- Pub Date:
- April 1993
- Bibcode:
- 1993ssdm.conf.2184H
- Keywords:
-
- Dynamic Structural Analysis;
- Modal Response;
- Sensors;
- Trusses;
- Vibration Measurement;
- Compression Tests;
- Frequency Measurement;
- Hardware;
- Structural Mechanics